package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PostMapping;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加商品到购物车
     * @param shoppingCartDTO
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //判断当前加入购物车的商品是不是已经存在
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);

        //如果存在数量+1
        if(list!=null&&list.size()>0){
            ShoppingCart Cart = list.get(0);
            Cart.setNumber(Cart.getNumber()+1);
            shoppingCartMapper.updateNumberByID(Cart);
        }else{//如果不存在就插入有关的购物车数据
            Long dishId=shoppingCartDTO.getDishId();
            Long setmealId=shoppingCartDTO.getSetmealId();
            if(dishId != null){
                // 本次添加到购物车的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());

            }else{
                // 本次添加到购物车的是套餐
                Setmeal setmeal = setmealMapper.getByID(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());


            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);

        }


    }

    /**
     * 查看购物车
     * @return
     */
    public List<ShoppingCart> showShoppingCart() {
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //判断当前加入购物车的商品是不是已经存在
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        return list;
    }

    public void cleanShoppingCart() {

        //
        shoppingCartMapper.clean(BaseContext.getCurrentId());

    }

    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {

        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());

        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        ShoppingCart Cart = list.get(0);
        if(Cart.getNumber()==1){
            shoppingCartMapper.deleteById(Cart.getId());
        }else{
            Cart.setNumber(Cart.getNumber()-1);
            shoppingCartMapper.updateNumberByID(Cart);
        }


    }
}
